Theory of superfluidity in a polariton system

Details Theory of superfluidity in a polariton system Theory of superfluidity in a polariton system

Feb 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008tmp...154..319l&link_type=abstract

Theoretical and Mathematical Physics, Volume 154, Issue 2, pp.319-329

Mathematics

Mathematical Physics

2

Exciton, Polariton, Superfluidity, Functional Integration Method, Popov Approximation

Scientific paper

We consider the superfluidity properties of a two-dimensional system of polaritons in an optical cavity. Deriving an expression for the effective low-energy action for thermodynamic phase fluctuations, we simultaneously obtain the expression for an analogue of superfluid density in the system in terms of the current-current correlation function and also find the expression for the current operator. We describe the Bogoliubov approximation for a polariton system and calculate the superfluid density. We discuss the Berezinskii-Kosterlitz-Thouless transition in the system under study.

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